thomaschrstnsn/dotfiles

nix home-manager flake

dotfiles aka machine configuration

This is the personal configuration for Thomas Christensen.

Feel free to borrow parts and/or make your own based on this.

A configuration setup based on Nix flakes for:

• Home Manager
• nix-darwin
• NixOS

As such it can be used to configure:

• my home directory (shell and utils, dev setup) on a UNIX system (using Nix the package manager with Home Manager)
• my macOS user (defaults, apps and the above) (using Nix the package manager with nix-darwin)
• a full machine running NixOS (apps, services, hardware and kernel config)

A motivation/overview of Nix flakes for configuring machines: NIX FLAKES, PART 3: MANAGING NIXOS SYSTEMS.

Prerequisites

• Nix
• Experimental nix flake support until released

Using home-manager

./apply.sh home will apply the homeManagerConfigurations defined as $HOST.$USER in machines.nix

hint: to apply and reload: ./apply.sh home && reload_zshrc

to preview changes without applying:

./build.sh home

Using nix-darwin

The nix-darwin (Nix on macOS) can be configured to use Yabai + SKHD (tiling window manager with a hotkey daemon). For more information on this type of setup, see this video.

Install Nix

Use The Determinate Nix Installer to install nix with flakes on your macOS machine.

Applying changes

./apply.sh darwin will apply the darwinConfigurations defined as $HOST in machines.nix

To preview changes without applying: ./build.sh darwin. The built configuration will be placed in ./result.

Using nixos

./apply.sh nixos will apply the nixos configuration defined for $HOST in machines.nix.

To preview changes without applying: ./build.sh nixos

Updating lockfile

Use ./update.sh to write a new lock file (updating all the inputs)

To preview what has changed, try ./lock-to-github.sh which can show github links to the different inputs including differences to the currently locked.

Listing dependents

nix-store --query --referrers /nix/store/8mlz1pppq90x4j959932jzhm982rb2rc-gtk4-4.6.5

nix-tree.sh

As with apply.sh and build.sh, this command will invoke nix-tree with the current (or specified) configuration.

Why depends?

# home manager
nix why-depends .#homeManagerConfigurations.aeris.thomas.activationPackage nixpkgs#ghc-8.10.4
# darwin (with allow unfree)
NIXPKGS_ALLOW_UNFREE=1 nix why-depends --impure .#darwinConfigurations.aeris.system nixpkgs#nodePackages.vscode-langservers-extracted

Cleaning old system generations

Running ./clean-old-generations.sh (as with sudo for nixos/nix-darwin) will clean any profiles older than 30 days.

Inspiration

• wiltaylor and his awesome videos

• jordanisaacs

• hardselius

• Luca Cambiaghi

• shaunsingh

• azuwis (aarch64)

• Excellent introduction to nix (sans flakes it seems): Chris Titus Tech